10-2-6. HIJACKED AIRCRAFT
When you observe a Mode 3/A Code 7500, an unexplained loss of beacon code, change in direction of flight or altitude, and/or a loss of communications, notify supervisory personnel immediately. As it relates to observing a Code 7500, do the following:
NOTE-
Military facilities will notify the appropriate FAA ARTCC, or the host nation agency responsible for en route control, of any indication that an aircraft is being hijacked. They will also provide full cooperation with the civil agencies in the control of such aircraft.
EN ROUTE. During narrowband radar operations, Code 7500 causes HIJK to blink in the data block.
NOTE-
Only nondiscrete Code 7500 will be decoded as the hijack code.
a. Acknowledge and confirm receipt of Code 7500 by asking the pilot to verify it. If the aircraft is not being subjected to unlawful interference, the pilot should respond to the query by broadcasting in the clear that he/she is not being subjected to unlawful interference. If the reply is in the affirmative or if no reply is received, do not question the pilot further but be responsive to the aircraft requests.
PHRASEOLOGY-
(Identification) (name of facility) VERIFY SQUAWKING 7500.
